岩土工程学报2024，Vol.46Issue(6)：1166-1176,11.DOI:10.11779/CJGE20230204
不同推进比下螺旋桩在砂土中安装力的离散元研究
Discrete element study of method for installation forces of screw piles in sand under different advancement ratios
摘要
Abstract
The installation of a screw pile,as a potential offshore wind power foundation form,is the key to its successful application in offshore wind power engineering.Based on the discrete element method,the installation forces of the screw pile installed under different advancement ratios in sand and the interaction between the screw pile and the surrounding soil are simulated with PFC3D.On the macro-level,the effects of the installation advancement ratio on the installation forces acting on the shaft,base and upper and lower surfaces of the helix of the screw pile are studied.Microscopically,the changes in porosity,coordination number and stresses in the surrounding soil during the installation of the screw pile are analyzed.The research shows that with the reduction of the advancement ratio,both the vertical force and the torque acting on the screw pile decrease,and the disturbance caused by installation of the screw pile to the surrounding soil also reduces.The mechanisms of installation of the screw pile are different for advancement ratios equal to or below 1.The research results provide some insights into the conditions required for the installation of screw piles under different advancement ratios.关键词
螺旋桩/推进比/砂土/离散元法Key words
screw pile/advancement ratio/sand/discrete element method分类
建筑与水利引用本文复制引用
王乐,李钰,徐志军,刘波,张春会,田英辉..不同推进比下螺旋桩在砂土中安装力的离散元研究[J].岩土工程学报,2024,46(6):1166-1176,11.基金项目
国家自然科学基金面上项目(51978247,51879183) （51978247,51879183）
国家自然科学基金重大项目(51890913) （51890913）
